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JEE MainChemistryGeneral Organic Chemistry

Which of the following compounds is a metamer of ethyl propanoate?

Options

  1. APentanoic acid
  2. BPropyl propanoate
  3. C3-Methylbutanoic acid
  4. DMethyl butanoate

Correct answer

D. Methyl butanoate

Step-by-step solution

Ethyl propanoate is an ester with the molecular formula C ₅ H ₁₀ O ₂ and the structure CH ₃ CH ₂ COOCH ₂ CH ₃ . Metamers are structural isomers that have the same molecular formula and the same polyvalent functional group, but differ in the nature of the alkyl groups attached to either side of the polyvalent functional group. Let us analyze the given options: 1) Pentanoic acid ( CH ₃ CH ₂ CH ₂ CH ₂ COOH ): It is a carboxylic acid, hence a functional isomer, not a metamer. 2) Propyl propanoate ( CH ₃ CH ₂ COOCH ₂ CH

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